1.3.4 Viewing differences

You do not remember modifying `driver.c', so you want to see what
has happened to that file.

$ cd tc
$ cvs diff driver.c

This command runs diff to compare the version of `driver.c'
that you checked out with your working copy. When you see the output
you remember that you added a command line option that enabled the
optimization pass. You check it in, and release the module.